/Engine/Source/Runtime/OpenGLDrv/Public/OpenGLState.h
These enum is just used to count the number of members in this struct.
enum EGLSamplerData { EGLSamplerData_WrapS, EGLSamplerData_WrapT, EGLSamplerData_WrapR, EGLSamplerData_LODBias, EGLSamplerData_MagFilter, EGLSamplerData_MinFilter, EGLSamplerData_MaxAniso, EGLSamplerData_CompareMode, EGLSamplerData_CompareFunc, EGLSamplerData_Num, }